7
votes
1answer
3k views

Why would an UPDATE SET REPLACE() statement match rows, but change none and give no warnings?

I'm seeking a certain string in a field and want to replace it with a new string. Specifically, I want all references to one URL to be changed to another URL. I've crafted this SQL statement and am ...
2
votes
1answer
271 views

MySQL Update: why would rows matched change based on the set clause?

I ran an update query joining across a huge number of tables that updated one field, and it matched 29k some-odd rows. Running the same query with only an addition in the Set clause increased the ...